https://bugs.winehq.org/show_bug.cgi?id=43315
--- Comment #36 from Katherine katheru19@gmail.com --- (In reply to Kimmo Myllyvirta from comment #1)
Created attachment 58657 [details] quick fix
This is related to WSAIoctl, SIO_GET_EXTENSION_FUNCTION_POINTER. The call is successful, but Steam compares if cbBytesReturned < 4, and it fails since wine sets it to 0. Not sure how correct the attached patch is, but at least Steam starts with it.
Can I apply this fix? I'm using wineskin-2.6.2 I can't install wine-staging since I'm on OS X 10.6.8, that's why this is the only way I could use Steam in the first place :(